Tire-shoe wrapping and vulcanizing apparatus.



R. ROWLEY.

TIRE SHOE WRAPPING AND VULCANIZING APPARATUS.

APPLICATION FILED APR. 6. 1910 Patented Dec. 27, 1910.

ma ma psi ROBERT ROWLEY, or New YORK, NIY.

TIRE-SHOE wiaarr nc AND v uLoaNIzING PPAR TUS] erases.

I '0 all whom it may concern:

Be 1t known that I, ROBERT RoWLEY', c1t1- zen of the United States, residing at New *erence being had therein to the York city, in' the county of New York and State of New York, have invented certain new and useful Improvements in Tire-Shoe Wrapping and Vulcanizing Apparatus, of which the following is a specification, refaccompanying drawings.

This invention relates to apparatus for use in wrapping tire shoes of clencher-bead or other type prior to, and holding them wrapped during, vulcanization by the open cure process.

The object of the invention is to produce a new form of apparatus which is convenient for assemblage with the mandrel,

shoe carcass and wrapping, and which: is

better adapted than analogous prior apparatus for shaping the clencher-beads or otherwise shaped margins of the shoe during' the wrapping and vulcanizing operations.

In the accompanying drawings, Figure 1 1s a transverse, sectional view, at line 1-1 of Fig. 3, of an assembled shoe carcass havlng embedded clencher bead rings; annular mandrel; inner detachable ring of the mandrel; a pair of annular bead or shoe margin-shaping rings; wrapping, and wrapping-compression plates in their initial wrapping-compression position. Fig. 2 is a view similar to Fig. 1, but shows the parts in final position, after the wrapping is in place, for. inward wrapping-compression movement of the annularly lipped sideplates. Fig. 3 is a side elevation of what is shown in Fig. 1.

In the drawings, 1 is anannular mandrel on which the shoe carcass 2 is circumferentially mounted and circumferentially 1nclosed in the usual .vulcaoizable rubber tread 2*. Generally, the carcass is'built up on the mandrel out of strips of friction fabric cirthey are to be after vulcanization; but, nev,-

ertheless, it is important not to deform either Specification of LettersPatent.

Application filed April 6, 1910: =Seria1 No." 553,862.

. the soft bead rings-ortheir encasement the Patented ea. 27. rain.

bead rings and their encasement forming the shoe beads) during the wrapping-com press-ion operation; It is also important'to secure these vulcanizable shoe beads, and to pre-perfect the shape which they are to receive during vulcanization and which they are to have in subsequent use. As the shoe beads, when in use, are clamped in a wheel rim, it is important that they be compacted and perfectly shaped prior to and during vulcanization. To secure thisjimportant result with a maximum of convenience and certainty, I prefer to make the inner'periphcry of the mandrel flat, as at 4, to engage snugly with the sidewise movable mandrel ring 5, the margins of which project laterally at each side of the inner periphery of the mandrel. The mandrel ring 5 is sidewise and, slidably movable within the annular mandrel to facilitate its assemblage with the mandrel. This ring 5 is readily and cheaply made with a fiat outer periphery, and is best bolted at 6, midway between its edges, to the inner flat peripheral wall of the mandrel, midway between the mandrel sides,

whereby its laterallylprojecting margins, in connection with the sloping sides of the mandrel, form. annular spaces in whichthe shoe beads are contained. 'The outer, flat peripheral faces of the laterally projectingmargins of the mandrel ring form hearings on which the two head or margin-shapihgrings 7 are .mounted so as to slidesidewisef"'the inner surfaces of these bead-shaping'rings being of a contour corresponding to the outward wall of the clencher-beads 801 the shoe;

lVhen the parts aforesaidare initially assembled, the temporary wrapping W, usually of wet strips of fabric, is wound spirally and tlghtly around the exposed portion of the shoe and also around the margin or headshaping rings 7 and the mandrel ring 5, and 7 through the latter, the wrapping extending tangentially on each side of the slide, from a point well toward the tread to the edges of the mandrel-ring. Thus on each side-of the shoe and circumferentially around each side, the tightly Wound wrapping is out of contact ,with the shoe carcass, from a point wrapping is initially in' place, the wrappingcompresslon rings 9, one on one side and the other on the other side of the mandrel, are assembled with their transverse-holding pins 10 and with their inwardly projecting, a1:

well toward the tread inwardly. men the carcass.

nular lips 11 against the wrapping oppw site the marginal portions of the shoe carcass, just outwardly of the outer peripheries of the laterally slitlable shaping-rings 7. The side-plates, as they are commonly called, or wrapping-compression rings 9 are then forced together to strain the wrapping over and against the tread and side walls of the carcass. In their inward movement, the

side-plates move the bead rings 7 farther inwardly, causing their upper lips a; to move into the clencher grooves and shape them, while the lips 11 are straining the wrapping laterally projectlng mandrel ring; a pair of over and against the tread and sides of the The lower concave faces of rings 7 are pressed against the lateral walls of the shoe beads, and, consequently, the inward movement of the rings. 7 compresses and shapes and holds in shape the clenchergroove and outer surfaces of the heads, the margins of the shoe being thus forced into the annular and somewhat angular space between each lateral margin of the mandrel ring and the adjacent slopingsideof the mandrel. The shoe, enormously compacted from bead to head, is secured, and the wrapping held in place from head to head during open cure vulcanization.

.The annular, inwardly projecting lips 11 of the compression-rings 9 are of an interior diameterslightly greater than the outer diameter of the rings 7, so as to move inwardly past rings. 7 during the compression movement, and these lips 11 are deeper or longer than the lateral projection of the mandrel ring on each side of the inner periphery of the mandrel,sufliciently longer to prevent the body portions 13 of the sideplates coming in contact with the opposite .edges of the mandrel ring during the inward movement, so that the lips 11 and also i the rings 7 can be forced inwardly against the wrapping is wound in place.

'of the rings the somewhat elastic, though highly compacted, carcass, as far as the carcass itself will resiliently permit. In this way, maximum compactness of the shoe beads is secured. The slidable bead-shaping rings 7, having circumferentially extending, transversely concave faces corresponding to the exterior contour of theshoe beads, in clencher tires, are initially tslid inward when :The final inward movement, due to the inward compressive movement of the side-plates on the wrapping, e

7 ,and they also are forced home as far: as the carcass willresiliently permit. The, side-plates are usuall moved inward by compression in a b raulic or other powerful press.

If the mar 'ns of the shoe are not to be of cleneher-bca formation. the inward faces fiects the ,final inward movement .shoe margin shaping-rings,

be considered as shoe margin-shaping rings.

What I claim is 1. In tire-wrapping apparatus, the comblnation of an annular mandrel; an inner,

mounted on a projecting margin of the mandrel ring; and a pair of wrappmg-compression-plates having inward annular lips, the

. drel ring; a

inner diameters of which are greater than the outer diameters of the shoe margin shapingrings.

2. In tire-wrapping apparatus, the combination of an annular mandrel; an inner, laterally projecting mandrel ring; a pair of shoe margin shaping-rings, each slidably mounted on a projecting margin of the manwrapping tubularly inclosing the mandrel, and a shoe when in place, together with the mandrel ring and bead margin shaping-rings; a pair of wrapping-compression-plates having inward annular lips, the inner diameters of which are greater than the outer diameters of the margin shapingrings; and means for holding said wrapping-compression-plates in laterally movable relation one to another and to the mandrel.

3. In tire-wrapping apparatus, the combination of an annular mandrel; an inner, laterally projecting mandrel ring, the outer periphery of which is in contact with the inner periphery of the mandrel; a pair of clencher bead shaping-rings, each slidably mounted on a projecting margin of the mandrel ring, and having an inner, circumferentially extending, trams verse, concave surface; a wrapping tubularly inclosing, when a shoe is in place, the shoe, mandrel, mandrel ring and bead shaping-rings; a pair of wrappingcompression plates having inward, annular lips, the inner diameters of which are greater than the out-er diameters of thebead shaping-rings; and means for holding said wrapping-compression plates in laterally movable relations one to another.

In testimony whereof I have afiixed my signature in presence of two witnesses.

ROBERT ROWLEY.

Witnesses E. S. BEACH,- F. E. NARES.

each slidably 1 

